Patent US3979330A successfully refreshed from Google Patents.
US3979330A
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Carbon containing molecular sieves
Assignee: Bergwerksverband GmbH
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Filing: 1974-02-21
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Granted: 1976-09-07
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Expires: 1994-02-21
Abstract
Abstract Process for preparing carbon containing molecular sieves adapted for separating small molecular gases in particular oxygen from nitrogen which comprises treating coke having a content of volatile components of up to 5% at 600°-900°C with a hydrocarbon splitting off carbon whereby the split-off carbon is deposited in the carbon framework of the coke under narrowing of the existing pores.
Inventors
- 👤 Heinrich Munzner
- 👤 Heinrich Heimbach
- 👤 Werner Korbacher
- 👤 Werner Peters
- 👤 Harald Juntgen
- 👤 Karl Knoblauch
- 👤 Dieter Zundorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0259; C01B13/0262; C01B13/0266; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/045; C01B21/0455; C01B21/0461; C01B32/00; C01B32/30; C01B32/306; C01B2210/00; C01B2210/0043; C01B2210/0045
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
80 words
In a process for the production of a carbon-containing molecular sieve, the step of contacting particulate coke having pores of a first effective size with a carbonaceous gaseous substance when said coke has a temperature in excess of about 600°C, said carbonaceous substance splitting off carbon at said temperature, and said carbon being at least partially deposited in said pores to thereby reduce the effective size of said pores from said first effective size to a smaller second effective size.
Claim 2
Dependent Claim
80 words
In a process for the production of a carbon-containing molecular sieve, the step of contacting particulate coke having pores of a first effective size with a carbonaceous gaseous substance when said coke has a temperature in excess of about 600°C, said carbonaceous substance splitting off carbon at said temperature, and said carbon being at least partially deposited in said pores to thereby reduce the effective size of said pores from said first effective size to a smaller second effective size.
Claim 3
Dependent Claim
23 words
A process as defined in claim 1, wherein said particulate coke comprises particles having a particle size between substantially 0.1 and 20 millimeters.
Claim 4
Dependent Claim
21 words
A process as defined in claim 1, wherein said coke has a volatile components content of at most about 5 percent.
Claim 5
Dependent Claim
15 words
A process as defined in claim 1, wherein said temperature is at most about 900°C.
Claim 6
Dependent Claim
26 words
A process as defined in claim 1, wherein the step of contacting said coke with said gaseous carbonaceous substance is performed in a substantially inert atmosphere.
Claim 7
Dependent Claim
31 words
A process as defined in claim 1, wherein the step of contacting said coke with said gaseous carbonaceous substance is carried out for a period between substantially 1 and 60 minutes.
Claim 8
Dependent Claim
17 words
A process as defined in claim 1, wherein said second size is less than about 0.3 millimicrons.
Claim 9
Dependent Claim
34 words
A process as defined in claim 1, and further comprising the step of coking a particulate cokable material at a coking temperature in excess of substantially 600°C so as to obtain said particulate coke.
Claim 10
Dependent Claim
50 words
A process as defined in claim 8, said cokable material having a volatile components content in excess of 5 percent; and wherein said coking is performed in a substantially airless atmosphere and for a period of time sufficient to reduce said volatile components content to less than about 5 percent.
Claim 11
Dependent Claim
34 words
A process as defined in claim 8, wherein the step of contacting said particulate coke with said gaseous carbonaceous substance is effected without cooling the particulate coke obtained from the coking step below 600°C.
Claim 12
Dependent Claim
51 words
A process as defined in claim 8; and further comprising the step of forming shaped bodies from said cokable material and at least one binding agent selected from the group consisting of pitches, bitumens, tar and tar oils, the step of forming said shaped bodies being performed prior to said coking.
Claim 13
Dependent Claim
28 words
A process as defined in claim 11, said binding agent generating gaseous coking products during said coking; and wherein said gaseous carbonaceous substance comprises said gaseous coking products.
Claim 14
Dependent Claim
23 words
A process as defined in claim 11, wherein said binding agent constitutes substantially 15 to 40 percent by weight of said shaped bodies.
Claim 15
Dependent Claim
21 words
A process as defined in claim 8; and further comprising the step of oxidizing said cokable material prior to said coking.
Claim 16
Dependent Claim
19 words
A process as defined in claim 14, wherein said oxidation is carried out at a temperature of substantially 230°C.
Claim 17
Dependent Claim
38 words
A process as defined in claim 14, wherein the step of oxidizing said cokable material comprises passing a stream of an oxygen-containing gas through said cokable material so as to form a fluidized bed of said cokable material.
Claim 18
Dependent Claim
26 words
A process as defined in claim 14, wherein said cokable material has an oxygen content of substantially 12 percent by weight subsequent to the oxidizing step.
Claim 19
Dependent Claim
26 words
A process as defined in claim 8, wherein the coking step comprises heating said cokable material at a rate of substantially 3° to 10°C per minute.
Claim 20
Dependent Claim
30 words
A process as defined in claim 1, wherein said gaseous carbonaceous substance comprises at least one substance selected from the group consisting of coke-oven gas, illuminating gas and municipal gas.
Claim 21
Dependent Claim
41 words
A process as defined in claim 1, wherein said gaseous carbonaceous substance comprises at least one substance selected from the group consisting of benzene, toluene, xylene, naphthalene, methane, ethane, hexane, cyclohexane, ethylene, acetylene, methanol, ethanol, isopropanol, methylene chloride and carbon tetrachloride.
Claim 22
Dependent Claim
126 words
A process for the production of a carbon-containing molecular sieve which adsorbs oxygen more readily than nitrogen from mixtures containing oxygen and nitrogen which comprises heating coke particles having a size between substantially 0.1 and 20 millimeters and a volatile components content of at most about 5 percent in a substantially inert atmosphere at a temperature between substantially 600° and 900°C while a gaseous stream of a carbonaceous substance which splits off carbon at said temperature is passed into contact with said coke particles for such a period between about 1 and 60 minutes that the carbon which is thus split off is deposited in the pores of said coke particles and reduces the effective average size of said pores to less than about 0.3 millimicrons.
Claim 23
Dependent Claim
126 words
A process for the production of a carbon-containing molecular sieve which adsorbs oxygen more readily than nitrogen from mixtures containing oxygen and nitrogen which comprises heating coke particles having a size between substantially 0.1 and 20 millimeters and a volatile components content of at most about 5 percent in a substantially inert atmosphere at a temperature between substantially 600° and 900°C while a gaseous stream of a carbonaceous substance which splits off carbon at said temperature is passed into contact with said coke particles for such a period between about 1 and 60 minutes that the carbon which is thus split off is deposited in the pores of said coke particles and reduces the effective average size of said pores to less than about 0.3 millimicrons.
References Cited (Backward Citations)
US3801513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |